1 Introduction Speaker microphone is optional accessories of TETRAPOL system portable radio G2 (Jupiter). It enables clear and comfortable voice communication via G2 terminal. Speaker microphone has sophisticated acoustic and optical signalling functions and there is also additional function of a lamp. It is possible to connect external earpiece to the speaker microphone.
Acoustic signalling Short beep after pressing and releasing PTT. It is possible to disconnect acoustic signalling only at the supplier. Optical signalling Beginning of real transmission is indicated by red LED on front side of the speaker microphone. Real radio transmission indicated by red LED can start short time after pressing PTT due to busy radio network.
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